Warm-air furnace



July 3, 19.28. 1,676,054

R. w. sATTERHoLM WARM AIR FURNACE Filed June 4, 1927 Patented July 3, 1923.

naires stares PAtTElf-@T OFFICE.

kROBERT W. SATTERHOLM, OF CHICAGO, ILLINOIS.

WARM-AIR FUBNACE.

Application filed `tune 4,

This inventionrelates to improvements in Warm air furnaces, and one of the objects of the invention is to provide an improved furnace of this character in which gas may be employed as a heating medium and which furnace Will be so constructed and arranged that a maximum heat radiating surface Will be provided to the air currents which are being circulated therethrough, with the re sult that the air Will be quickly heated and a maximum amount of heat by the use of a minimum amount of fuel Will bevobtained.

A further object is to provide improved means which ivill retard the flow of air current-s through the heating` chamber. thereby insuring a thorough heating of the air before it is discharged from the heating chamber or furnace.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction7 combination and arrangement of the several parts hereinafter more fully described and claimed and shoivn in the accompanying drawings illustrating this invention. and in which Figure 1 is a vertical sectional view taken online 11` Figure Q, of a furnace constructed in accordance with the principles of this invention.

Figure. 2 is a vieu partly in vertical section,V4 partly in elevation and .With parts omitted, as taken on line .f-2, `Figure 1..

Figure 3 is a detail horizontal sectional vieu7 taken on line 33, Figure 2.

rlhe furnace consists essentially of a casing having side ivalls 10 provided with inwardly openinggrooves 11-12 respectivelyv -at the top and bottoni thereof. v horizontal plate or Vmember 13 is provided with an upright encompassing tiange 14 spaced from the side edges of the member 13 so that the edges of the member 13 will enter the grooves 11. vThis member 13 is secured to the side members by means of suitable fastening devices 15, preferably in the form of bolts which pass through the flangel llt and through the adjacent edges of the side menibers.

A bottom member 16 is provided with a vseries of openings having encompassing' flanges 1T on the upper face thereof and depending from the loiver face of the memrber 1G are flanges 18 which encompass the member and the flanges 18 are spaced from 1927. Serial N0. 196,448.

the lateral edges of the member 16 so that the edges of this member will enter the grooves 12. Fastening devices such as bolts 19 are provided for securing' the member '16 to the side members 10 and these fastening devices pass through the flanges 1S and the ad]acent portions of the members 10.

An end plate 2O engages the front edges of the members 10 to extend across the space therebetween and is secured in positionby-ineans of fastening devices 21-22 passing through the end member and the respective flanges lil and 18. i

The end plate 2O is provided With a door opening 22 and a rear plate 23 secured in position in the same manner as the front plate Q0. is provided With an outlet opening 2st arranged preferably adjacent the top vof themembers 10.

The structure thus formed constitutes a heating chamber and the members 10 are so arranged that they will diverge from the bottom plate 13 to the top plate 1G to forni inclined Walls. The end members Q() and 23 are similarly shaped.

tubular members 25 are arranged Within the chamber thus formed, and "the lower en ds of these members telescope iespectivelv Jwith the iianges 1.7 and the upper ends telesco ne into openings 26 in the plate or member The tubular members 25 are of a tapered construction. the larger diameter being disposed adjacent the bottom of the heating chamber7 While the smaller diameter is disposed adjacent the top of the chamber so that the Walls of the tubular member 25 ivill converge in directions opposite to the direction which the walls 10 of the heatinfr chamber converge. a

lilith this construction itivill be manifest that the heating` area of the members 10 and of the peripheries of the tubular members 25 Will be increased` y The structure thus formed is supported in any suitable manner preferablv bv means of suitable supports 2T, any numbuer (if Which maybe provided and to Which supports t-he heating chamber is secured. These supports 27 are connected by means of suitable angle irons 28 which serve as a means for supporting the structure intermediate the supports 2T.

A second heating chamber designated generally by the reference numeral 29 and constructecl in a manner similar to the heretofore described chamber may be provided and coupled with the first chamber. Thesecond chamber is provided with an openingv in the end plate 8l adjacent the opening Q4, and a. coupling 32 is disposed between the openings andthese chambers may be fastened together in any'suitable manner, such as by means of fastening bolts passing through suitable ears or projections 33 on the respective adjacent end plates.

Spacing nipples 34 may also be provided between the members.

The chamber 29 is provided with conical members 35, similar vto the conical members 25 and intermediate the members 35 are baffles 36 which are arranged 1n staggered relation and alternately extendlng from the top and bottom walls of the chamber 29 to `,generally by the reference numeral 40,

which may be constructed of any suitable material, preferably sheet material and secured together in any suitable manner. The casing 40 is in the nature o1 a hood and entirely encloses both of the chambers. The casing is of a size to be spaced from the walls ot the chambers and is provided with iues tl through which the heated air may be conveyed to the point o'l use.

Burners l2 of any desired construction may be employed as a Yheating medium and if desired members el may be supported by means of suitable brackets le acent but spaced from the walls oi the chambers and also from the walls of thecasing 40.

These members 43 are provided so as to hold the incoming air in Contact with the side members of the heating chambers. It will be noted that the walls l0 of the heating chambers converge downwardly from the top and as the members 43 are arranged uprightly flues will be formed between the members l0 and the members 43. These iues decrease in size from the bottom to the y top of the heating chamber, with Athe result that the passage of the air through the space between these two members will be retarded, thereby insuring a thorough heating of the air. j i

Air is supplied to the casing 40 in any suitable manner, such as through an air inlet opening 45 in one of the walls of the casing. Y

lVith this improved construction it will be manifest that the par-ts. may be manufactured and shipped in a knock down condition and may be readily assembled by astening the various plates together.

The walls of the heating chamber diverge from the bottom upwardly and these diverging' wallsco-operate with the walls of the casing 4t() to form passages or lines which are gradually restricted or reduced from the bottom to the top of the heating chamber, thereby retarding a sudden rushing of the air over the heating surfaces so as to insure a thorough heating loi? the air before itis discharged through the fines 4l. y.

l/Vhile the preferred form of the invention has been herein shown and described, itis to be understood that various changes may be made in the details of construction and in the combination and arrangement of' the several parts, within the scope of the claims, without departing from the spirit of this invention. I l l Vhat is claimed as new is l. A warm air-furnace embodying a casing having an air inlet and an outlet, a heatlng chamber within thecasing and out Yof communication therewith, means supporting the chamber above the bottom of the casing, said heating chamber being spaced from the wall of the casing and embodying upright walls and top and bottom/plates, said plates having alined openings therethrough, the openings in the upper plate being of a smaller diameter than the openings in the bottom plate, the'side walls of the heating chamber diverging from the said bottom to the said top plate, vertical tubes arranged` within the heating chambelysaid ytubes tapering frointhe bottom'to the top thereofl and having communication at their en ds respectively with the' openings in the said bottom and top plates7 whereby communication will be established with the said casing through the heating chamber, the said tubes `(3o-operating with the side walls o the said casing to orm passages for the products of combustion tapering in a direction opposite to the direct-ion of taper of the air passages through the fines, an inlet and an outlet to the said heating chamber both being disposed adjacent the base of the chamber but out of direct communication with each other, and a burner in the heating chamber. 2. A' warm air furnace embodying a casing having an air inlet andfanjutletfaheating chamber within the casing and out of communication therewith, means support-ing the chamber above the bottom of the casing, said heating chamber being'spaced from the wall of theV casing and embodying upright walls and; top and bottom plates, said plates having alined openings therethrough, f the openings in the upper plate being of a smaller diameter than the'openings'in the bottom plate, the side walls of the heating chamber diverging from thesaid Vbottom to the said top plate, vertical tubes arranged lou within the heating chamber, said tubes tapering from the bottom to the top thereof and having communication at their ends respectively with the openings in the said bottom and top plates, whereby communication will be established with the said casing through the heating chamber, the said tubes co-operating with the side walls of the said cas ing to form passa-ges for the products of combustion tapering in a direction opposite to the direction of taper of the air passages through the lues, an inlet and an outlet to the said heating chamber, both being disposed adjacent the base of the chamber but out of direct communication with each other, a burner in the heating chamber, and baffles within the heating chamber intermediate the said tubes, said baiiies being arranged in staggered relation with respect to each other.

3'. A warm air furnace embodying a casing having an air inlet and an outlet, a heating chamber1 within the casing and out of communication therewith and spaced from the walls thereof, means for supporting the chamber above the bottom of the casing, said chamber embodying two sections out of communication with each other except for a passage located at a predetermined point in the height of the chamber, each of said sections embodying upright walls and top and bottom plates, said plates having alined openings therethrough, the openings through the top plates being smaller than the openings through the respective bottom plates, the side walls of the chamber sections diverging from the bottom to the top plates, vertical tubes arranged in the respective chamber sections, said tubes tapering from the bottom to the top thereof and having communication at their ends respectively with the openings in the said bottom and top plates whereby communication will be established with the said casing through the respect-ive chamber sections, the said tubes co-operating with the side walls of the respective chamber sections to form passages for the products of combustion tapering in a direction opposite to the direction of taper of the air passages through the flues, an inlet and an outlet te the said heating chamber, both being disposed adjacent the base of the chamber but out of direct communication with each other, and a burner in one of the heating chamber sections.

4. A warm air furnace embodying a casing having an air inlet and an outlet, a. heating chamber' within the casing and out of communication therewith and spaced from the walls thereof, means for supporting the chamber above the bottom of the casing, .said chamber embodying two sections out of communication with each other except for a passage located at a predetermined point in the height of the chamber, each of said sections embodying upright walls and top and bottom plates, said plates having alined openings therethrough, the openings through the top plates being smaller than the openings through the respective bottom plates, the side walls of the chamber sections diverging from the bottom to the top plates, vertical tubes arranged in the respective chamber sections, said tubes tapering from the bottom to the top thereof and having communication at their ends respectively with the openings in the said bottom and top plates whereby communication will be established with the said casing through the respective chamber sections, the said tubes co-operating with the side Walls of the respective chamber sections to form passages for the products of combustion tapering in a direction opposite to the direction of taper of the air passages through the flues, an inlet and an outlet to the said heating chamber, both being disposed adjacent the base of the chamber but out of direct communication with each other, a burner in one of the heating chamber sections, and baffles in the other chamber section, said baffles being arranged in staggered relation with respect to each other.

In testimony whereof I have signed my name to this speciication, on this 27th day of May, A. D. 1927.

ROBERT W. SATTERHOLM. 

